Method of making side frames for car-trucks



(No Model.) v

' H. H. HEWITT.

METHOD OF MAKING SIDE FRAMES FOR GAR TRUGKS.

No. 571,525. Patented Nov. 17, 1896.

UNITED STATES ATENT FFICE.

HERBERT H. HEIVITT, OF BUFFALO, NElV YORK.

METHOD OF MAKING SIDE FRAMES FOR CAR-TRUCKS.

SPECIFICATION forming part of Letters Patent No. 571,525, dated November17, 1896.

Application filed October 5, 1896. Serial No. 607,939. (No model.) I

To all whom it may concern:

Be it known that I, HERBERT H. HEWITT, a citizen of the United States,and a resident of the city of Buffalo, in the county of Erie, in theState of New York, have invented certain new and useful Improvements inMethods of Making Side Frames for Car-Trucks, of which I do declare thefollowing to be a full, clear, and exact description, sufficient toenable others skilled in the art to practice my invention.

The present invention has for its object to provide an improved methodof making a side frame of the type set forth in an application forLetters Patent filed by me in the United States Patent Oflice September3,

1896, Serial No. 604,812.

The side frame to which my invention especially'applies is rolled from asingle plate girder or beam with its edges thickened, preferably bylateral flanges and reinforce-ribs, and the end portions of the end orbody are thereafter cut away, leaving the thickened or flanged edges ofthe side frame projecting at its ends. The projecting end portions ofthe side frame are thereafter bent outwardly or expanded and at the sametime the uncut end portions of the web or body are stretched so as toafford an integral connection between the inner portions of the bentthickened edges of the side frame. If the ends of the web or body arecut away upon a straight line between its thickened edges, then when thethickened or flanged edges of the end portions are bent outwardly andthe uncut ends of the web or body between such bent portions arestretched the metal of the web or body at such points will by thestretching operation be reduced in thickness beyond the thickness of theremainder of the body or web of the side frame. In order to guardagainst any material reduction in the thickness of the uncut ends of theweb or body during the stretching operation, I provide an excess ofmetal at such points, such excess of metal projecting beyond a straightline drawn between the thickened edges of the side frame at the ends ofthe web or body. By this means it will be seen that as the uncut ends ofthe web or body are stretched at the time the 0 material reduction inthickness of such por- 5 5 tions of the web or body will be avoided.

Figure 1 is a View in side elevation of the rolled plate girder or beambefore the end portions of the web or body have been cut away. Fig. 2 isa View in side elevation after the end portions of the web or body havebeen removed to form the spaces for the pedestals. Fig. 3 is a side viewof the finished side frame. Fig. 4is an end view of the beam shown inFig. 1.

After the plate girder or beam has been rolled to the shape shown inFig. 1 the end portions of the web or body A will be cut away, leavingthe thickened or flanged portions of the Web or body projecting, as at aand a at each end. By reference to Fig. 2 it will be seen that the endportions of the web or body A are cut away upon the curved lines a, soas to leave an excess of metal at such points. Hence as the projectingend portions a a of the side frame are bent out wardly, as shown in Fig.3, the excess metal at the ends of the web or body A will wholly or ingreat part compensate for the stretching of the end portions of the webor body as the thickened portions of the side frame are thus bentoutward. Consequently when the end portions of the web or body arestretched to the required extent they will be but little if any thinnerthan the unstretched portions of the web or body. In this way uniformityof strength is given to the side frame and all danger of materiallyweakening the end portions of the web or body, which points aresubjected to great strain, is avoided.

I claim That improvement in the art of forming a metallic side frame forcar-trucks that consists in rolling a plate girder or beam withthickened or flanged edges thereafter cutting 9 5 away the end portionsof the web or body of the girder or beam in such manner as to leaveanexcess of metal at the ends of the web of said girderor beam, andthereafter expanding body will permit such parts being unduly rethethickened or flanged edges (one or both) of duced in thickness,substantially as set forth. said girder or beam and stretching invertical direction the uncut end portions of the Web or HERBERT H.HEWITT. 5 body, whereby the ends of said body are made Witnesses:

broader than its central portion and whereby GEO. P. FISHER, J12,

the excess metal at the ends of the Web or ALBERTA ADAMIOK.

